Have had some questions and some don't recognise some less known eriks so here is a list:
Erik's:
Lerik-Gaston Leroux Original Book Erik
Cherik-1925 Silent Film Lon Chaney
Erique-1943 Claude Rains as Erique Claudin
Petrie-1962 Hammer Horror film Herbert Lom as Proffesor Petrie (Erik)
Merik-1987 Andrew Lloyd-Webber Stageshow Michael Crawford
Rerik-1989 Horror Film with Robert Englund
Derik-1990 miniseries with Charles Dance
Yerik-The Offbroadway Musical Erik by Yeston&Kopit
Kerik-Susan Kay's 1990 book 'Phantom'
Ferik-Frederick Forsyth's sequel book 'Phantom of Manhattan'
Deriko-Dario Argento's "Il Fantasma Del'opera"
Herik-Howard McGillin in the Current ALW Broadway Show
Gerik-Gerard Butler in the 2004 ALW film